One day a 6 year old kid accompanied his mother on a morning walk in the park. While walking, the kid saw something on the ground, picked it up and started to put it in his mouth. His mother took that away from him and told him not to do that again.
“Why can’t I do that, Mommy?” He asked.
“Because it was lying on the ground and you don’t know how long it’s been there, so many people might have walked over it so it’s dirty and might have germs on it which is very dangerous”, She replied
He looked at her with admiration and said, “I think you are right. Mommy, you are so smart, how do you know all these things?”
Thinking quickly she replied, “All Mommies know such things. It’s on mommy’s test. They got to know it or they won’t let you be a Mommy”
“Okay” said the kid and they both walked in silence for few minutes when the kid said (after pondering over the new information), “All right now I get it… If you don’t pass the test you get to be the Daddy.”
“Exactly”, she said with a big smile on her face